Extract, Transform, and Load Google Cloud Storage Data in Informatica PowerCenter

Informatica provides a powerful, elegant means of transporting and transforming your data. By utilizing the CData ODBC Driver for Google Cloud Storage, you are gaining access to a driver based on industry-proven standards that integrates seamlessly with Informatica's powerful data transportation and manipulation features. This tutorial shows how to create a simple Workflow in Informatica PowerCenter to extract Google Cloud Storage data and load it into a flat file.

Add Google Cloud Storage as an ODBC Data Source

If you have not already, install the driver on the PowerCenter server and client machines. On both machines, specify the connection properties in an ODBC DSN (data source name). This is the last step of the driver installation. You can use the Microsoft ODBC Data Source Administrator to create and configure ODBC DSNs.

Authenticate with a User Account

You can connect without setting any connection properties for your user credentials. After setting InitiateOAuth to GETANDREFRESH, you are ready to connect.

When you connect, the Google Cloud Storage OAuth endpoint opens in your default browser. Log in and grant permissions, then the OAuth process completes

Authenticate with a Service Account

Service accounts have silent authentication, without user authentication in the browser. You can also use a service account to delegate enterprise-wide access scopes.

You need to create an OAuth application in this flow. See the Help documentation for more information. After setting the following connection properties, you are ready to connect:

• InitiateOAuth: Set this to GETANDREFRESH.
• OAuthJWTCertType: Set this to "PFXFILE".
• OAuthJWTCert: Set this to the path to the .p12 file you generated.
• OAuthJWTCertPassword: Set this to the password of the .p12 file.
• OAuthJWTCertSubject: Set this to "*" to pick the first certificate in the certificate store.
• OAuthJWTIssuer: In the service accounts section, click Manage Service Accounts and set this field to the email address displayed in the service account Id field.
• OAuthJWTSubject: Set this to your enterprise Id if your subject type is set to "enterprise" or your app user Id if your subject type is set to "user".
• ProjectId: Set this to the Id of the project you want to connect to.

The OAuth flow for a service account then completes.

Create an ETL Workflow in PowerCenter

Follow the steps below to create a workflow in PowerCenter to pull Google Cloud Storage data and push it into a flat file.

Create a Source Using the ODBC Driver

1. In PowerCenter Workflow Manager, add a new ODBC relational connection by going to Connections -> Relational, and in the first window select the ODBC type and click New.
2. In the Relational Connection Editor, set the name of the newly created connection and set the User Name and Password based on the credentials utilized to connect to your Repository. Under the Connection String input your System DSN, which by default is called 'CData GoogleCloudStorage Sys'.
3. In PowerCenter Designer, connect to your repository and open your folder. If you do not already have a folder created, you will need to manually create a folder for your repository. To create a folder, open Informatica PowerCenter Repository Manager, connect to your Repository Service and go to Folder -> Create to create a new folder.
4. Select the Source Analyzer, click the sources menu, and select Import from Database...
5. In the drop-down menu for ODBC data source, select the DSN you previously configured (CData GoogleCloudStorage Sys).
6. Click connect and select the tables and views to include.
7. Click OK.

Create a Flat File Target Based on the Source

1. Select the Target Designer and drag and drop the previously created source onto the workspace. Using the existing source copies the columns into the target.
2. Right-click the new target, click edit, and change the database type to flat file.

Create a Mapping to Between Google Cloud Storage Data and a Flat File

1. Click on the Mapping Designer.
2. Drag the source and target to the workspace (name the new mapping, if prompted).
3. Right-click on the workspace and select Autolink by Name.
4. Drag the columns from the source qualifier to the target definition.
5. Save the folder (Ctrl + S).

Create Workflow Based on the Mapping

With the source, target, and mapping created and saved, you are now ready to create the workflow.

1. Right-click the mapping and select generate workflow to open the Workflow Generation wizard.
2. Create a workflow with a non-reusable session.
3. Ensure that you have properly configured the connection object and set the prefixes. If you have not already done so, you will need to create an Integration Service. To create an Integration Service, open your Administrator site, and under Domain, create a new PowerCenter Integration Service. Under the PowerCenter Repository Service, select the Repository you are referring to, and as Username and Password, use your Administrator login information.
4. Configure the Connection as needed.
5. Review the Workflow and click Finish.

With a workflow created, you can open the PowerCenter Workflow Manager to access and start the workflow, quickly transferring Google Cloud Storage data into a flat file. With the CData ODBC Driver for Google Cloud Storage, you can configure sources and targets in PowerCenter to integrate Google Cloud Storage data into any of the elegant and powerful features in Informatica PowerCenter.